what about something simpler like this?
var res2 = from i in invitations
group i by o.User into g
select new {g.Key.Id, amount = g.Sum(i => i.Amount)};
El 19 de febrero de 2011 00:43, Juan Pablo Romero Méndez <
[email protected]> escribió:
> var res2 = from u in users
> join i in invitations on u.Id equals i.UserInfo.Id
> select new {u.Id, i} into o
> group o by o.Id into v
> select new {v.Key, amount = v.Sum(x => x.i.Amount)};
>
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